China New Product Multi Circuit Board - 4 Layer FR4 ENIG Impedance Control PCB – Huihe

About The Impedance Control

In the case of transmission of high frequency signals, the controlled impedance helps to ensure that the signal does not decay significantly during transmission. In essence, controlled impedance refers to the matching of the material properties of the substrate to the characteristics of the line/dielectric layer to ensure that the impedance value of the line signal is within the tolerance of the reference value. Controlled impedance PCBs provide reliable and consistent high frequency characteristics.

Applications Of The Impedance Control

Internet box, TV, video game, digital camera, GPS Analog and digital telecommunications Computers, tablets, cell phones Video signal processing Motor control module

Relationship Between Characteristic Impedance Factors

From the perspective of PCB manufacturing, the key factors that affect the impedance are as follows: – Line width (W), the impedance decreases with the increase of linewidth. – Line distance (s), the impedance increases with the increase of distance. -Line thickness (T), the impedance decreases with the increase of line thickness. – Dielectric thickness (H), the greater the dielectric thickness, the greater the impedance. – Dielectric constant (DK), the higher the dielectric constant, the smaller the impedance.

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